#define _CRT_SECURE_NO_WARNINGS

#include <iostream>
using namespace std;

namespace Cat {
	int mao = 715;

	namespace race {
		char coffee_cat;
	}
}

using namespace Cat;

int main()
{

	//printf("%d", mao);
	int n = 0;
	cin >> n;
	cout << "-" << n;

	return 0;
}